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James Holmes parents Robert and Arlene Holmes arrive at district court for the arraignment of their son Aurora theater shooting suspect James Holmes in Centennial, Colo., on Tuesday, March 12, 2013. The judge has entered a not guilty on behalf of James Holmes after his lawyer said he's not ready to enter a plea. Holmes is charged with killing 12 people and wounding more than 50 in a crowded Colorado movie theater last year. (AP Photo/Ed Andrieski)

James Holmes parents Robert and Arlene Holmes arrive at district court for the arraignment of their son Aurora theater shooting suspect James Holmes in Centennial, Colo., on Tuesday, March 12, 2013. The judge has entered a not guilty on behalf of James Holmes after his lawyer said he's not ready to enter a plea. Holmes is charged with killing 12 people and wounding more than 50 in a crowded Colorado movie theater last year. (AP Photo/Ed Andrieski)